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Cylindropuntia tesajo

Tesajo Cholla

Overview

Cylindropuntia tesajo, commonly known as the Tesajo Cholla or Pencil Cholla, is a highly drought-resistant, slender-stemmed succulent subshrub belonging to the family Cactaceae. It is celebrated for its intricate branching habits and survival strategies in extreme desert biomes.

Taxonomy and Naming

Originally described by George Engelmann as Opuntia tesajo, this species was subsequently reassigned to the genus Cylindropuntia due to its cylindrical jointed stem morphology 1. The specific epithet "tesajo" is derived from the regional vernacular term referencing the dry, stringy appearance of its stems and spines.

Distribution and Habitat

This species is endemic to Mexico, prominently found across the Baja California Peninsula (both Baja California and Baja California Sur) and parts of the Sonora Desert 2. It thrives in hyper-arid desert valleys, rocky slopes, and dry shrublands at elevations ranging from sea level up to 1,200 meters.

Appearance

Cylindropuntia tesajo forms a densely branched shrub reaching up to 1.5 meters in height. The stems are cylindrical, remarkably slender (0.5 to 1 cm in diameter), and display a light green to grayish hue. Areoles bear mostly solitary, occasionally up to 3, sharp grayish or yellow-brown spines. Small, inconspicuous pale-yellow or greenish flowers bloom in late spring, followed by dry, spineless fruits.

Cultivation

In cultivation, it requires full, direct sun and an exceptionally porous mineral substrate. Watering should be infrequent, employing the 'soak and dry' method, allowing the medium to dry out completely. While frost-hardy for short durations, protection from freezing winter dampness is vital.

Common Cultivation Mistakes

The most prevalent failure is using organic-rich, heavy soils combined with overwatering, which invariably leads to root rot. Insufficient light leads to etiolation, rendering the thin branches weak and structurally compromised.

References

  1. Plants of the World Online (POWO). Royal Botanic Gardens, Kew. ↩
  2. IUCN Red List of Threatened Species. Cylindropuntia tesajo Assessment. ↩
Light

Full Sun

Requires full, direct sunlight for several hours a day. Indoors, place it by the brightest south-facing window.

Watering

12-35 Days

Water thoroughly only when the soil is completely dry. Extremely susceptible to rot from overwatering.

Soil

Well-draining, gritty cactus mix composed of pumice, coarse sand, and minimal organic matter

Thrives in a highly porous, mineral-rich medium containing pumice, gravel, and minimal peat.

Safety

Risky for Pets

Equipped with extremely sharp, barbed spines. Keep out of reach of curious pets and children.

Difficulty

Moderate

An easy-to-care-for succulent for those who can resist the urge to overwater.

Native Habitat

Mexico (Baja California, Sonora)

Native to the arid, rocky desert regions of the Baja California Peninsula and Sonora, where it grows in dry gravelly plains.

Frequently Asked Questions

Can Cylindropuntia tesajo be grown in pots?
Yes, it can be successfully cultivated in pots provided you use highly porous clay containers and a mineral-rich soil mix.
How often should Tesajo Cholla be watered?
During summer, water roughly every 12 days once the soil is bone dry. In winter, suspend watering almost completely.
What is the best soil mix for this cactus?
An ideal mix consists of at least 70% pumice, coarse sand, and lava grit, with very little organic matter to ensure superb drainage.
Is it toxic to pets?
While not chemically toxic, its extremely sharp, barbed spines can easily lodge in pets' paws, mouths, or eyes, causing severe physical injury.
How much sun does Cylindropuntia tesajo need?
It requires at least 6 hours of direct, unfiltered sunlight daily. Indoors, place it near a bright south-facing window.
How can I encourage it to bloom?
Provide maximum sunlight during spring and summer, and ensure a cool, bone-dry winter dormancy period to stimulate flower buds.
What is its growth rate?
Similar to other desert chollas, it has a slow to moderate growth rate, especially when kept in indoor container cultivation.
Is it cold hardy during winter?
It can tolerate brief cold drops down to -5°C (23°F) if kept completely dry, but protection from frost is highly recommended.
Why are the stems of my cactus shriveling?
Prolonged drought causes shriveling, which is cured by a thorough watering. If shriveling occurs in wet soil, it indicates root rot.
How do you propagate it?
It is easily propagated by taking stem cuttings, letting them callus for a few days, and then planting them in sandy soil.